Symphony I/O Mk II: General

What are the dimensions/measurements of the Symphony I/O MkII?

Symphony I/O Mk II Dimensions:

•    Inches: 17.75 (19 with Rack Ears) x 11.5 x 3.5
•    Centimeters: 45 (48.26 with Rack Ears) x 29.2 x 8.9


Packaging Dimensions:

Symphony I/O MkII Chassis Box

•    Inches: 22.875 x 17.75 x 9.25
•    Centimeters: 58.1 x 45.1 x 23.5

I/O Module Box

•    Inches: 13.75 x 12.25 x 3.25
•    Centimeters: 34.9 x 31.1 x 8.3





Do I need to install Apogee software to use Symphony I/O MkII with Pro Tools HD?

A Symphony I/O MkII with a Pro Tools HD Option card installed requires no Apogee software to use it as an HD interface with Pro Tools HD. All of the Symphony’s parameters can be adjusted from the front-panel touchscreen and things like routing, sample-rate, and clock source are adjusted from Pro Tools HD software.

If you’re using the Symphony I/O MkII as a Thunderbolt interface, you will need to make sure the Symphony I/O MkII software is installed and the firmware is up to date.

How to reset the Symphony I/O MkII

To reset while powering on unit:

Press and hold on the ‘Control’ knob while powering on the Symphony I/O MkII. Continue to hold down the ‘Control’ knob until the startup screen finishes.


To reset while unit is already powered on:

Go to the ‘Setup’ page on the touchscreen by tapping on the icon that looks like a gear at the bottom right-hand corner of the touchscreen.  Once you’re on the ‘Setup’ page, tap on the ‘Configuration’ tab.  Tap the ‘Reset Unit’ button in the lower left-hand corner of the screen.  Tap ‘Yes’ in the dialog that asks if you’re sure you want to reset.

How does the routing for the Symphony I/O 2×6 I/O module show up in Pro Tools HD?

When using a 2×6 i/o module in a Symphony I/O (MkI or MkII), the 2×6 i/o module shows up as a 16ch Avid HD I/O in Pro Tools HD. Here is how the I/O corresponds with the ProTools I/O (Note that PT inputs 3 through 6 are nothing. This is so all the input and output channel numbers line up with each other when using hardware inserts):


Pro Tools Inputs 1-2             Line Inputs 1-2
Pro Tools Inputs 3-4             N.A.
Pro Tools Inputs 5-6             N.A.
Pro Tools Inputs 7-8             AES Inputs 1-2
Pro Tools Inputs 9-16           Optical Inputs 1-8

Pro Tools Outputs 1-6          Line Outputs 1-6
Pro Tools Outputs 7-8          AES Outputs 1-2
Pro Tools Outputs 9-16        Optical Outputs 1-8




What I/O modules are supported in Symphony I/O MkII and are there restrictions?

The following Original I/O modules are also supported in Symphony I/O MkII:

– 8×8 AES/OPT
– 8×8 AES
– 8×8 OPT
– 16×16 Analog In/Out (original)
– 2×6
– 8MicPre

All MkII and later module cards are compatible with the MkII chassis.

There are no restrictions on which module can go in the primary slot or the secondary slot when using Thunderbolt mode*, with the exception that when using the MicPre module, you must have an 8×8 (any version) or a 16×16 Analog In/Out (original or MkII) installed in the primary slot and the MicPre module installed in the secondary slot.

*When using the Symphony I/O MkII in ProTools HD mode, 2×6 modules must be installed in the secondary slot when using 2×6 modules with any other modules. Example: if you have an 8×8 module and a 2×6 module, the 2×6 module must be installed in the secondary slot when using the Symphony I/O MkII in ProTools HD mode.

The following I/O modules are not supported in Symphony I/O MkII:

– 16 Analog In/Digital Out
– 16 Digital In/Analog Out

To see i/o module compatibility for the older original Symphony I/O, click here.

What is the maximum current capacity of the 48V phantom power? Will it handle any microphone?

Any Apogee product that includes microphone inputs with 48v phantom power is designed to handle loads up to a complete short, or 14.1 mA. This will properly power any microphone.